Tilting carrier mechanism



Sept. 19, 1967 EN EFAL 3,342,360

TILT ING CARRIER MECHANI SM Filed May 11, 1964 United States Patent 3,342,360 TIIIIING CARRIER MECHANISM Joseph Folkard Eden, Shenley, Harold Gordon Vallings, London, and David John Tudor Webb, Kingswood, Watford, England, assignors, by mesne assignments, to Minister of Technology, London, England Filed May 11, 1964, Ser. No. 366,585 1 Claim. (Cl. 214-660) This invention relates to mobile materials-handling appliances and equipment.

The object of the invention is to improve the handling capabilities of such appliances and equipment.

The device whereby the above object is obtained consists in a mobile materials handling appliance comprising a mast which is pivoted at its lower end for it to be capable of rotation, guide means on the mast, a trolley which is mounted on the guide means so as to be movable up and down the mast, a load carrier pivoted to the trolley at its base, drive means mounted on the appliance, a cable interconnecting the drive means and the trolleypulley on the mast, and a mechanical linkage between the mast and the trolley, which comprises a pivoted link connecting the mast to the upper end of the lower carrier so that when the trolley is in its lowest position the link is fully extended downwards and that as the trolley is pulled upwards by the cable the load carrier is gradually caused to tip outwards from the mast.

The invention will be described with reference to an embodiment shown in the accompanying drawings of a mobile materials handling appliance designed for tipping.

In the drawings:

FIGURE 1a is a side elevation of a materials handling appliance capable of operation for tipping purposes and shown in its power shuttle position.

FIGURE 1b is the same as FIGURE 1a for the travelling position; and

FIGURE is a figure similar to FIGURE 1a showing the discharge position of the device.

The chassis 29 of the mobile three-wheeled appliance shown in the drawing has pivoted to its front end, the mast '94 which can move, for example, between 30 or 40 inboard and 6 outboard under control of an hydraulic piston and cylinder 7, pivotally interconnecting the chassis 29 and the mast 94.

A cable 6 passes from a powder driven drum 20 mounted on the appliance, via a first cable length 19, over a pulley on the upper end of the mast 94, from which a second cable length 18 passes to the top of a mast trolley 91.

By means of the drum 20 and the cable 6, the trolley 91 can be moved to any desired position along the mast as described below.

The mast preferably consists of spaced columns of I- beam cross-section with channels facing one another so that the internal faces of the channel sidfls form guide rails for wheels carried at opposite sides of the mast trolley 91, so that the trolley can roll up and down the mast under control of the cable.

Pivot pins 92 on the base of skip 94 detachably engage in slotted lugs on the base of trolley 91.

The top of the skip carries ears 93. Links 96 pivotally connect the ears 93 to fixed pivots 97 on the mast 94.

This method of attaching the skip in combination with the ability to luff the mast inboard and outboard of the vertical enables the skip to be used as a power-operated shovel for picking up loose materials, for transporting materials, and also provides for controlled discharged by progressive tipping. The skip may be filled in the powershovel position FIG. 1a and, by tilting the mast inboard and lowering the trolley, brought to the travelling position FIG. 1b. If desired, the skip may be filled when in the travelling position. Controlled discharged is effected by tilting the mast outboard and raising the trolley, as shown at FIG. 10. Since the links 96 pivot on fixed points 97 on the mast, the upward movement of the pivots 92 on the trolley causes the links 96 to rotate anti-clockwise on their pivots 97 fixed to the mast, so that the skip rotates clockwise about its pivots 92 on the trolley, thus discharging the contents of the skip under the full control of the operator.

What we claim is:

Mobile materials handling appliances comprising a mast which is pivoted at its lower end so as to be capable of rotation, guide means on said mast, a trolley which is mounted on said guide means so as to be movable up and down said mast, a load carrier pivoted to said trolley, drive means mounted on said appliance, a cable interconnecting said drive means and said trolley via a pulley on said mast, and a mechanical linkage between said mast and said trolley comprising a pivoted link connecting said mast to the upper end of said load carrier so that when said trolley is in its lowest position said link is fully extended downwards and said trolley is pulled upwards by said cable, said load carrier is gradually caused to tip outwards from said mast.

References Cited UNITED STATES PATENTS 1,768,149 6/1930 Remde 214-317 X 2,008,324 7/1935 Grab 214-672 X 2,150,821 3/1939 Dempster 214-317 2,569,053 9/1951 Healy 214-672 3,033,401 5/ 1962 Hallswor-th 214-672 3,125,236 3/1964 Huff 214-315 X FOREIGN PATENTS 192,329 10/ 1957 Austria.

GERALD M. FORLENZA, Primary Examiner. R. B, JOHNSON, Assistant Examiner, 

